I used the files without problems .qtz (or mov. qtz) with Tiger 10.0.4, but not reacted to the sound ((QC was not save the audio in settings on "line in".)
I have seen several forums and it seems that there is no solution.
OK. I change to Leopard as it appears to solve this problem. But now "Export to QT movie" does not work and the projects of modul8 that had files .mov (Qtz) do not open and this crash...
Really great change...